Massachusetts Institute of Technology   Visiting Scholar

1999.7 - 2000.6

Tokyo Institute of Technology   Graduate School of Science and Engineering   Assistant Professor

1999.4 - 1999.6

Tokyo Institute of Technology   School of Engineering   Assistant Professor,

1993.4 - 1999.3

Postdoctral Research Fellow of Japan Society for Promotion of Science

1992.4 - 1993.3

The American Ceramic Society

Materials Research Society of Japan

日本MRS

応用物理学会

DV-Xalpha研究協会

Nanoscale dynamics of hydrogen in VO2 studied by μSR Reviewed

H. Okabe, M. Hiraishi, A. Koda, Y. Matsushita, T. Ohsawa, N. Ohashi, R. Kadono

Physical Review Materials   2024.2

Foreword to the focus issue: metal atom clusters and superatoms: from fundamentals to functional nanocomposites

Tetsuo Uchikoshi, Naoki Ohashi, Fabien Grasset

Science and Technology of Advanced Materials   25 ( 1 )   2024

Full polarization reversal at room temperature in unsubstituted AlN

Kota Hasegawa, Takao Shimizu, Takeo Ohsawa, Isao Sakaguchi, Naoki Ohashi

APPLIED PHYSICS LETTERS   123 ( 19 )   2023.11

Ammonia Cracking Catalyzed by Ni Nanoparticles Confined in the Framework of CeO₂ Support

Hiroshi Mizoguchi, Yuta Osawa, Masato Sasase, Naoki Ohashi, Masaaki Kitano, Hideo Hosono

The Journal of Physical Chemistry Letters   9516 - 9520   2023.10

In-plane lattice orientation in aluminum scandium nitride epitaxial films deposited on Nb-doped SrTiO<sub>3</sub>(111) substrates via reactive magnetron sputtering

Kota Hasegawa, Takao Shimizu, Naoki Ohashi

Journal of the Ceramic Society of Japan   2023.7

Local Magnetism in the Spin-singlet State of VO₂

Hirotaka Okabe, Masatoshi Hiraishi, Akihiro Koda, Yoshitaka Matsushita, Takeo Ohsawa, Naoki Ohashi, Ryosuke Kadono

Proceedings of the 29th International Conference on Low Temperature Physics (LT29)   2023.5

Electronic transport properties of GeS single crystals grown by vapor transport from molten GeS source Reviewed

Masaru Nakamura, Encarnación G. Víllora, Takeo Ohsawa, Kiyoshi Shimamura, Naoki Ohashi

Journal of Crystal Growth   2023.5

Local electronic structure of dilute hydrogen in β−Ga2O3 probed by muons

M. Hiraishi, H. Okabe, A. Koda, R. Kadono, T. Ohsawa, N. Ohashi, K. Ide, T. Kamiya, H. Hosono

Physical Review B   107 ( 4 )   2023.1

A review on functional nanoarchitectonics nanocomposites based on octahedral metal atom clusters (Nb 6 , Mo 6 , Ta 6 , W 6 , Re 6 ): inorganic 0D and 2D powders and films

Ngan T. K. Nguyen, Clément Lebastard, Maxence Wilmet, Noée Dumait, Adèle Renaud, Stéphane Cordier, Naoki Ohashi, Tetsuo Uchikoshi, Fabien Grasset

Science and Technology of Advanced Materials   2022.12

High performance {Nb 5 TaX 12 }@PVP (X = Cl, Br) cluster-based nanocomposites coatings for solar glazing applications

Clément Lebastard, Maxence Wilmet, Stéphane Cordier, Clothilde Comby-Zerbino, Luke MacAleese, Philippe Dugourd, Naoki Ohashi, Tetsuo Uchikoshi, Fabien Grasset

Science and Technology of Advanced Materials   2022.12

Light-dependent ionic-electronic conduction in an amorphous octahedral molybdenum cluster thin film Reviewed

Kenshi Harada, Thi Kim Ngan Nguyen, Fabien Grasset, Clothilde Comby-Zerbino, Luke MacAleese, Fabien Chirot, Philippe Dugourd, Noée Dumait, Stéphane Cordier, Naoki Ohashi, Motohide Matsuda, Tetsuo Uchikoshi

NPG Asia Materials   14 ( 1 )   2022.12

Facile Synthesis and Characterization of Molybdenum Carbides/Carbon Nanocomposites by Laser Pyrolysis

Théo Caroff, Pitalinani Badaki, Nathalie Herbert, Franck Tessier, David Berthebaud, Naoki Ohashi, Tetsuo Uchikoshi, Pierre Lonchambon, Nathalie Herlin-Boime, Fabien Grasset

Nanomanufacturing   2022.8

Investigation of local structures of silicon oxynitride glasses prepared from aerogels

Hiroyo Segawa, Yuta Osawa, Shunsuke Watanabe, Shingo Machida, Ken-ichi Katsumata, Atsuo Yasumori, Sadaki Samitsu, Kenzo Deguchi, Shinobu Ohki, Naoki Ohashi

Journal of Sol-Gel Science and Technology   104 ( 3 )   503 - 511   2022.7

Nuclear magnetic resonance of Li8 ions implanted in ZnO

Jonah R. Adelman, Derek Fujimoto, Martin H. Dehn, Sarah R. Dunsiger, Victoria L. Karner, Claude Levy, Ruohong Li, Iain McKenzie, Ryan M. L. McFadden, Gerald D. Morris, Matthew R. Pearson, Monika Stachura, Edward Thoeng, John O. Ticknor, Naoki Ohashi, Kenji M. Kojima, W.A. MacFarlane

Physical Review B   2022.7

Hafnium Oxide Nanostructured Thin Films: Electrophoretic Deposition Process and DUV Photolithography Patterning

Vanessa Proust, Quentin Kirscher, Thi Kim Ngan Nguyen, Lisa Obringer, Kento Ishii, Ludivine Rault, Valérie Demange, David Berthebaud, Naoki Ohashi, Tetsuo Uchikoshi, Dominique Berling, Olivier Soppera, Fabien Grasset

Nanomaterials   2022.7

Lattice deformation and phase transition of aluminum nitride studied by density functional theory calculations

Kota Hasegawa, Takao Shimizu, Naoki Ohashi

Journal of the Ceramic Society of Japan   2022.7

Controlling the Deposition Process of Nanoarchitectonic Nanocomposites Based on {Nb6−xTaxXi12}n+ Octahedral Cluster-Based Building Blocks (Xi = Cl, Br; 0 ≤ x ≤ 6, n = 2, 3, 4) for UV-NIR Blockers Coating Applications

Clément Lebastard, Maxence Wilmet, Stéphane Cordier, Clothilde Comby-Zerbino, Luke MacAleese, Philippe Dugourd, Toru Hara, Naoki Ohashi, Tetsuo Uchikoshi, Fabien Grasset

Nanomaterials   2022.6

Fabrication and characterization of zeolite bulk body containing mesopores and macropores using starch as pore-forming agent

Masako Uematsu, Kento Ishii, Sadaki Samitsu, Edhuan Bin Ismail, Izumi Ichinose, Naoki Ohashi, David Berthebaud, Jean-François Halet, Takamasa Ishigaki, Tetsuo Uchikoshi

Advanced Powder Technology   33 ( 6 )   103626 - 103626   2022.6

Electrical properties of zinc nitride and zinc tin nitride semiconductor thin films toward photovoltaic applications

Yong Wang, Takeo Ohsawa, Fahad Alnjiman, Jean-Francois Pierson, Naoki Ohashi

HIGH TEMPERATURE MATERIALS AND PROCESSES   41 ( 1 )   343 - 352   2022.5

Chemothermal pulverization: Crushing titanate crystals to obtain nanosized powders via high‐temperature treatment

Naoki Ohashi, Yoshio Matsui, Hiroyo Segawa, Noboru Tanida, Satoshi Nagaso, Masaya Nishida, Ichitaro Okamura, Yuta Osawa, Alfian Noviyanto, Benjamin Soulie, Kenji Watanabe, Toshiyuki Nishimura, Takeo Ohsawa, Yoshifumi Ogiso, Suetake Omiya

Journal of the American Ceramic Society   2022.3

Experimental and theoretical investigation of crystal structure of formamidinium–copper–iodide single crystals grown from aqueous solution

Naoki Ohashi, Yoshitaka Matsushita, Noriko Saito

Journal of Solid State Chemistry   2022.2

First Principles Calculation of Electrical and Optical Properties of Cu<sub>3</sub>AsO<sub>4</sub>: Promising Thin-Film Solar Cell Absorber from Nonferrous Metal Manufacturing By-Products Reviewed

Issei Suzuki, Sakiko Kawanishi, Naoki Ohashi, Aiga Gomi, Junya Kano, Hiroto Watanabe, Satoshi Asano, Takahisa Omata

MATERIALS TRANSACTIONS   63 ( 1 )   73 - 81   2022.1

Reentrant structural and optical properties of organic–inorganic hybrid metal cluster compound ((n-C4H9)4N)2[Mo6Bri8Bra6]

Norio Saito, Daiki Nishiyama, Yoshitaka Matsushita, Yoshiki Wada, Stéphane Cordier, Takeo Ohsawa, Fabien Grasset, Naoki Ohashi

CrystEngComm   2022

Crystal structure of formamidinium–lead–chloride–dimethyl sulfoxide and phase relationship of related crystalline systems

Noriko Saito, Yoshitaka Matsushita, Takeo Ohsawa, Hiroyo Segawa, Naoki Ohashi

CrystEngComm   2022

Synthesis of novel hexamolybdenum cluster-functionalized copper hydroxide nanocomposites and its catalytic activity for organic molecule degradation

Thi Kim Ngan Nguyen, Cédric Bourgès, Takashi Naka, Fabien Grasset, Noée Dumait, Stéphane Cordier, Takao Mori, Naoki Ohashi, Tetsuo Uchikoshi

Science and Technology of Advanced Materials   22 ( 1 )   758 - 771   2021.12

Growth and characterization of a gallium monosulfide (GaS) single crystal using the Bridgman method

Masaru Nakamura, Hiroaki Nakamura, Kiyoshi Shimamura, Naoki Ohashi

Journal of Crystal Growth   573   126303 - 126303   2021.11

Synthesis of bulk silicon oxynitride glass through nitridation of SiO2 aerogels and determination of Tg

Yuta Osawa, Kenichiro Iwasaki, Takayuki Nakanishi, Atsuo Yasumori, Yoshio Matsui, Toshiyuki Nishimura, Takeo Ohsawa, Hiroyo Segawa, Naoki Ohashi

Journal of the American Ceramic Society   104 ( 9 )   4420 - 4432   2021.9

Tunable photo-induced electronic property of octahedral metal clusters

Thi Kim Ngan Nguyen, Fabien Grasset, Noée Dumait, Stéphane Cordier, David Berthebaud, Naoki Ohashi, Tetsuo Uchikoshi

Materials Letters: X   11   2021.9

Investigation of Temperature-Dependent Hard X-ray Photoemission Spectra on Au/Nb:SrTiO3 Schottky Junctions

Takeo Ohsawa, Taisei Murakami, Takumi Hosaka, Shigenori Ueda, Takamasa Ishigaki, Naoki Ohashi

The Journal of Physical Chemistry C   125 ( 27 )   14836 - 14842   2021.7

Local electronic structure of dilute hydrogen in β−MnO2

H. Okabe, M. Hiraishi, A. Koda, S. Takeshita, K. M. Kojima, I. Yamauchi, T. Ohsawa, N. Ohashi, H. Sato, R. Kadono

Physical Review B   2021.4

Structural and electronic properties of the metal cluster‐based compounds including high concentration of solvent molecules

Norio Saito, Pierric Lemoine, Stéphane Cordier, Yoshitaka Matsushita, Takeo Ohsawa, Fabien Grasset, Jeffrey Scott Cross, Naoki Ohashi

Zeitschrift für anorganische und allgemeine Chemie   647 ( 7 )   751 - 758   2021.4

Lattice engineering by Sr-substitution leads to high piezoelectric performance of (SrxCa1-x)3TaAl3Si2O14 single crystals Reviewed

Xiuwei Fu, Encarnación G. Víllora, Yoshitaka Matsushita, Yuuki Kitanaka, Yuji Noguchi, Masaru Miyayama, Kiyoshi Shimamura, Naoki Ohashi

Journal of Alloys and Compounds   851   156860 - 156860   2021.1

Inverse Perovskite Oxysilicides and Oxygermanides as Candidates for Nontoxic Infrared Semiconductor and Their Chemical Bonding Nature

Naoki Ohashi, David Mora-Fonz, Shigeki Otani, Takeshi Ohgaki, Masashi Miyakawa, Alexander Shluger

Inorganic Chemistry   59 ( 24 )   18305 - 18313   2020.12

Micrometer-scale monolayer SnS growth by physical vapor deposition Reviewed

Hayami Kawamoto, Naoki Higashitarumi, Naoka Nagamura, Masaru Nakamura, Kiyoshi Shimamura, Naoki Ohashi, Kosuke Nagashio

Nanoscale   12 ( 45 )   23274 - 23281   2020.11

Development of a flux-film-coated sputtering (FFC-sputtering) method for fabricating c-axis oriented AlN film

Y. Song, F. Kawamura, K. Shimamura, T. Ohgaki, N. Ohashi

AIP Advances   10 ( 11 )   2020.11

Zn-Al layered double hydroxide-based nanocomposite functionalized with an octahedral molybdenum cluster exhibiting prominent photoactive and oxidation properties Reviewed

Thi Kim Ngan Nguyen, Yoshio Matsui, Naoto Shirahata, Noée Dumait, Stéphane Cordier, Fabien Grasset, Naoki Ohashi, Tetsuo Uchikoshi

Applied Clay Science   196   105765 - 105765   2020.10

Growth of germanium monosulfide (GeS) single crystal by vapor transport from molten GeS source using a two-zone horizontal furnace

Masaru Nakamura, Hiroaki Nakamura, Yoshitaka Matsushita, Kiyoshi Shimamura, Naoki Ohashi

Journal of Crystal Growth   547   125813 - 125813   2020.10

Zn–Al Layered Double Hydroxide Film Functionalized by a Luminescent Octahedral Molybdenum Cluster: Ultraviolet–Visible Photoconductivity Response

Thi Kim Ngan Nguyen, Noée Dumait, Fabien Grasset, Stéphane Cordier, David Berthebaud, Yoshio Matsui, Naoki Ohashi, Tetsuo Uchikoshi

ACS Applied Materials & Interfaces   12 ( 36 )   40495 - 40509   2020.9

Growth of Large Single Crystals of n-Type SnS from Halogen-Added Sn Flux

Sakiko Kawanishi, Issei Suzuki, Takeo Ohsawa, Naoki Ohashi, Hiroyuki Shibata, Takahisa Omata

Crystal Growth & Design   20 ( 9 )   5931 - 5939   2020.9

High-Quality GaN Crystal Growth Using Flux-Film-Coated LPE with Na Flux

Yelim Song, Fumio Kawamura, Takashi Taniguchi, Kiyoshi Shimamura, Naoki Ohashi

Crystal Research and Technology   55 ( 8 )   2020.8

High-Quality GaN Crystal Growth Using Flux-Film-Coated LPE with Na Flux

Yelim Song, Fumio Kawamura, Takashi Taniguchi, Kiyoshi Shimamura, Naoki Ohashi

CRYSTAL RESEARCH AND TECHNOLOGY   55 ( 8 )   2020.8

Original Synthesis of Molybdenum Nitrides Using Metal Cluster Compounds as Precursors: Applications in Heterogeneous Catalysis

Kevin Guy, Franck Tessier, Helena Kaper, Fabien Grasset, Noée Dumait, Valérie Demange, Mitsuaki Nishio, Yoshitaka Matsushita, Yoshio Matsui, Toshiaki Takei, David Lechevalier, Caroline Tardivat, Tetsuo Uchikoshi, Naoki Ohashi, Stéphane Cordier

Chemistry of Materials   32 ( 14 )   6026 - 6034   2020.7

Exploration of BaO–B2O3–Bi2O3 glasses as sintering aids for BaTiO3 ceramics

Tingting Li, Hiroyo Segawa, Naoki Ohashi

Ceramics International   46 ( 8 )   10233 - 10241   2020.6

Optical and structural investigations on titanium oxynitride films for visible-UV photocatalytic applications

Jun Mizushiro, Kohei Yoshimatsu, Naoki Ohashi, Masahiko Tanaka, Osami Sakata, Akira Ohtomo

Journal of Applied Physics   2020.4

Preparation and characterization of hollow silica nanocomposite functionalized with UV absorbable molybdenum cluster Reviewed

Thi Kim Ngan Nguyen, Fabien Grasset, Stéphane Cordier, Maria Amela-Cortes, Yoshio Matsui, Naoki Ohashi, Naoto Shirahata, Tetsuo Uchikoshi

Advanced Powder Technology   31 ( 2 )   895 - 903   2020.2

Polar nano-region structure in the oxynitride perovskite LaTiO2N Reviewed

Jun-ichi Yamaura, Sachiko Maki, Takashi Honda, Yoshio Matsui, Alfian Noviyanto, Toshiya Otomo, Hitoshi Abe, Youichi Murakami, Naoki Ohashi

Chemical Communications   56 ( 9 )   1385 - 1388   2020

Suppressing the carrier concentration of zinc tin nitride thin films by excess zinc content and low temperature growth

Yong Wang, Takeo Ohsawa, Xiangyue Meng, Fahad Alnjiman, Jean-Francois Pierson, Naoki Ohashi

Applied Physics Letters   2019.12

Structural and Thermal Properties in Formamidinium and Cs-Mixed Lead Halides

Shiro Kawachi, Mika Atsumi, Noriko Saito, Naoki Ohashi, Youichi Murakami, Jun-ichi Yamaura

The Journal of Physical Chemistry Letters   10 ( 22 )   6967 - 6972   2019.11

Silicon-compatible Mg<inf>2</inf>Si/Si n-p photodiodes with high room temperature infrared responsivity

El-Amir, A.A.M., Ohsawa, T., Ishii, S., Imura, M., Liao, M., Fu, X., Segawa, H., Sakaguchi, I., Nagao, T., Shimamura, K., Ohashi, N.

Materials Science in Semiconductor Processing   102   2019.11

Silicon-compatible Mg2Si/Si n-p photodiodes with high room temperature infrared responsivity

Ahmed A. M. El-Amir, Takeo Ohsawa, Satoshi Ishii, Masataka Imura, Meiyong Liao, Xiuwei Fu, Hiroyo Segawa, Isao Sakaguchi, Tadaaki Nagao, Kiyoshi Shimamura, Naoki Ohashi

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING   102   2019.11

Meso/macroscopically multifunctional surface interfaces, ridges, and vortex-modified anode/cathode cuticles as force-driven modulation of high-energy density of LIB electric vehicles

H. Khalifa, S. A. El-Safty, A. Reda, M. A. Shenashen, M. M. Selim, O. Y. Alothman, N. Ohashi

Scientific Reports   9 ( 1 )   2019.10

Achieving non-degenerate Zn3N2 thin films by near room temperature sputtering deposition

Yong Wang, Takeo Ohsawa, Yu Kumagai, Kou Harada, Fumiyasu Oba, Naoki Ohashi

Applied Physics Letters   2019.8

Comprehensive first-principles study of AgGaO<inf>2</inf> and CuGaO<inf>2</inf> polymorphs

Suzuki, I., Iguchi, Y., Sato, C., Yanagi, H., Ohashi, N., Omata, T.

Journal of the Ceramic Society of Japan   127 ( 6 )   339 - 347   2019.6

Erratum: “Effect of aging on the current transport properties at gold/niobium-doped strontium titanate Schottky junctions” [J. Appl. Phys. 125, 095301 (2019)]

Sakyo Hirose, Shigenori Ueda, Naoki Ohashi

Journal of Applied Physics   125 ( 17 )   179901 - 179901   2019.5

IR photoresponse characteristics of Mg2Ge pn-junction photodiodes fabricated by rapid thermal annealing Reviewed

Ahmed A.M. El-Amir, Takeo Ohsawa, Yuichi Oshima, Masaru Nakamura, Kiyoshi Shimamura, Naoki Ohashi

Journal of Alloys and Compounds   787   578 - 584   2019.5

Optoelectronic characteristics of the Ag-doped Si p-n photodiodes prepared by a facile thermal diffusion process

Ahmed A. M. El-Amir, Takeo Ohsawa, Satoshi Ishii, Masataka Imura, Hiroyo Segawa, Isao Sakaguchi, Tadaaki Nagao, Kiyoshi Shimamura, Naoki Ohashi

AIP Advances   9 ( 5 )   2019.5

Preparation of Proton Conductive Crystallized Tin Phosphate Glasses by Hydrothermal Treatments

Hiroyo Segawa, Masaya Aihara, Masaya Akamatsu, Atsuo Yasumori, Naoki Ohashi

physica status solidi (a)   2019.3

Effect of aging on the current transport properties at gold/niobium-doped strontium titanate Schottky junctions

Sakyo Hirose, Shigenori Ueda, Naoki Ohashi

Journal of Applied Physics   125 ( 9 )   2019.3

Ecofriendly Mg<inf>2</inf>Si-based photodiode for short-wavelength IR sensing

El-Amir, A.A.M., Ohsawa, T., Nabatame, T., Ohi, A., Wada, Y., Nakamura, M., Fu, X., Shimamura, K., Ohashi, N.

Materials Science in Semiconductor Processing   91   2019

ITO@SiO<inf>2</inf> and ITO@{M<inf>6</inf>Br<inf>12</inf>}@SiO<inf>2</inf> (M = Nb, Ta) nanocomposite films for ultraviolet-near infrared shielding

Chen, W., Nguyen, T.K.N., Wilmet, M., Dumait, N., Makrygenni, O., Matsui, Y., Takei, T., Cordier, S., Ohashi, N., Uchikoshi, T., Grasset, F.

Nanoscale Advances   1 ( 9 )   2019

Structure and Electron Mobility of ScN Films Grown on α-Al2O3(1102) Substrates

Takeshi Ohgaki, Isao Sakaguchi, Naoki Ohashi

Materials   2018.12

Conditions for growth of AlN single crystals in Al-Sn flux

Yelim Song, Fumio Kawamura, Takashi Taniguchi, Kiyoshi Shimamura, Naoki Ohashi

Journal of the American Ceramic Society   101 ( 11 )   4876 - 4879   2018.11

Preparation and some properties of Mg2Si0.53Ge0.47 single crystal and Mg2Si0.53Ge0.47 pn-junction diode Reviewed

Ahmed A. M. El-Amir, Takeo Ohsawa, Yoshitaka Matsushita, Yoshiki Wada, Kiyoshi Shimamura, Naoki Ohashi

AIP Advances   8 ( 11 )   2018.11

Piezoelectric Ca3TaAl3Si2O14 (CTAS): High quality 2-in. single-crystal growth and electro-elastic properties from room to high (650 °C) temperature

Xiuwei Fu, Encarnación G. Víllora, Yoshitaka Matsushita, Yuuki Kitanaka, Yuji Noguchi, Masaru Miyayama, Kiyoshi Shimamura, Naoki Ohashi

Journal of Crystal Growth   501   38 - 42   2018.11

Electronic Transport Properties Governed by Polarity Control through Tailoring of ZnO Bilayer Structures

Takeo Ohsawa, Kei Tsunoda, Yoshihito Yamagata, Benjamin Dierre, Sergey Grachev, Hervé Montigaud, Takamasa Ishigaki, Naoki Ohashi

Crystal Growth & Design   18 ( 10 )   5824 - 5831   2018.10

Growth‐Parameter Dependence of Polarity and Electronic Transports in ZnO Thin Films Deposited by Magnetron Sputtering

Takeo Ohsawa, Kei Tsunoda, Benjamin Dierre, Sergey Grachev, Hervé Montigaud, Takamasa Ishigaki, Naoki Ohashi

physica status solidi (a)   215 ( 16 )   1700838 - 1700838   2018.8

Controlling the electrical conductivity of ternary wurtzite-type and metastable β -AgGaO <inf>2</inf> by impurity doping

Nagatani, H., Suzuki, I., Takemura, S., Ohsawa, T., Ohashi, N., Fujimoto, S., Omata, T.

AIP Advances   8 ( 8 )   2018.8

Sintering behavior and dielectric properties of BaTiO3 added with BaO-Bi2O3-B2O3 glass phase

Tingting Li, Hiroyo Segawa, Naoki Ohashi

Ceramics International   44 ( 11 )   13004 - 13010   2018.8

Electronic correlation in the quasi-two-dimensional electride Y2C

M. Hiraishi, K. M. Kojima, I. Yamauchi, H. Okabe, S. Takeshita, A. Koda, R. Kadono, X. Zhang, S. Matsuishi, H. Hosono, K. Hirata, S. Otani, N. Ohashi

Physical Review B   98 ( 4 )   2018.7

Embedding hexanuclear tantalum bromide cluster {Ta<inf>6</inf>Br<inf>12</inf>} into SiO<inf>2</inf> nanoparticles by reverse microemulsion method Reviewed

Chen, W., Wilmet, M., Truong, T.G., Dumait, N., Cordier, S., Matsui, Y., Hara, T., Takei, T., Saito, N., Nguyen, T.K.N., Ohsawa, T., Ohashi, N., Uchikoshi, T., Grasset, F.

Heliyon   4 ( 6 )   2018.6

Observation of stacking faults and photoluminescence of laurate ion intercalated Zn/Al layered double hydroxide Reviewed

Kenshi Harada, Thi Kim Ngan Nguyen, Yoshio Matsui, Kazuko Fujii, Fabien Grasset, Naoki Ohashi, Motohide Matsuda, Tetsuo Uchikoshi

Materials Letters   213   323 - 325   2018.2

Self-passivated ultra-thin SnS layers via mechanical exfoliation and post-oxidation Reviewed

Naoki Higashitarumizu, Hayami Kawamoto, Masaru Nakamura, Kiyoshi Shimamura, Naoki Ohashi, Keiji Ueno, Kosuke Nagashio

Nanoscale   10 ( 47 )   22474 - 22483   2018

Extended study on electrophoretic deposition process of inorganic octahedral metal clusters: Advanced multifunctional transparent nanocomposite thin films

Ngan T.K. Nguyen, Adèle Renaud, Benjamin Dierre, Barbara Bouteille, Maxence Wilmet, Marion Dubernet, Naoki Ohashi, Fabien Grasset, Tetsuo Uchikoshi

Bulletin of the Chemical Society of Japan   91 ( 12 )   1763 - 1774   2018

Mo6 cluster-based compounds for energy conversion applications: comparative study of photoluminescence and cathodoluminescence

Benjamin Dierre, Karine Costuas, Noée Dumait, Serge Paofai, Maria Amela-Cortes, Yann Molard, Fabien Grasset, Yujin Cho, Kohsei Takahashi, Naoki Ohashi, Tetsuo Uchikoshi, Stéphane Cordier

Science and Technology of Advanced Materials   18 ( 1 )   458 - 466   2017.12

Wurtzite-Derived Quaternary Oxide Semiconductor Cu<inf>2</inf>ZnGeO<inf>4</inf>: Its Structural Characteristics, Optical Properties, and Electronic Structure

Kita, M., Suzuki, I., Ohashi, N., Omata, T.

Inorganic Chemistry   56 ( 22 )   14277 - 14283   2017.11

Heteroepitaxial growth and electric properties of (110)-oriented scandium nitride films Reviewed

Ohgaki, T., Sakaguchi, I., Ohashi, N., Haneda, H.

Journal of Crystal Growth   476   12 - 16   2017.10

Electrophoretic Coating of Octahedral Molybdenum Metal Clusters for UV/NIR Light Screening

Thi Nguyen, Benjamin Dierre, Fabien Grasset, Noée Dumait, Stéphane Cordier, Pierric Lemoine, Adèle Renaud, Hiroshi Fudouzi, Naoki Ohashi, Tetsuo Uchikoshi

Coatings   7 ( 8 )   2017.8

Effective, Low-Cost Recovery of Toxic Arsenate Anions from Water by Using Hollow-Sphere Geode Traps Reviewed

Mohamed A. Shenashen, Naeem Akhtar, Mahmoud M. Selim, Wafaa M. Morsy, Hitoshi Yamaguchi, Satoshi Kawada, Abdulaziz A. Alhamid, Naoki Ohashi, Izumi Ichinose, Ahmad S. Alamoudi, Sherif A. El-Safty

CHEMISTRY-AN ASIAN JOURNAL   12 ( 15 )   1952 - 1964   2017.8

Semimetallic bands derived from interlayer electrons in the quasi-two-dimensional electride Y2C

Koji Horiba, Ryu Yukawa, Taichi Mitsuhashi, Miho Kitamura, Takeshi Inoshita, Noriaki Hamada, Shigeki Otani, Naoki Ohashi, Sachiko Maki, Jun-ichi Yamaura, Hideo Hosono, Youichi Murakami, Hiroshi Kumigashira

Physical Review B   96 ( 4 )   2017.7

Variation of crystal structure and optical properties of wurtzite-type oxide semiconductor alloys of β-Cu(Ga,Al)O2

Hiraku Nagatani, Yuki Mizuno, Issei Suzuki, Masao Kita, Naoki Ohashi, Takahisa Omata

Journal of Applied Physics   121 ( 23 )   235103 - 235103   2017.6

Lattice and Valence Electronic Structures of Crystalline Octahedral Molybdenum Halide Clusters-Based Compounds, Cs2[Mo6X14] (X = Cl, Br, I), Studied by Density Functional Theory Calculations Reviewed

Norio Saito, Stéphane Cordier, Pierric Lemoine, Takeo Ohsawa, Yoshiki Wada, Fabien Grasset, Jeffrey S. Cross, Naoki Ohashi

Inorganic Chemistry   56 ( 11 )   6234 - 6243   2017.6

Bushy sphere dendrites with husk-shaped branches axially spreading out from the core for photo-catalytic oxidation/remediation of toxins Reviewed

Mohamed A. Shenashen, Satoshi Kawada, Mahmoud M. Selim, Wafaa M. Morsy, Hitoshi Yamaguchi, Abdulaziz A. Alhamid, Naoki Ohashi, Izumi Ichinose, Sherif A. El-Safty

NANOSCALE   9 ( 23 )   7947 - 7959   2017.6

From Cs<inf>2</inf>Mo<inf>6</inf>Cl<inf>14</inf> to Cs<inf>2</inf>Mo<inf>6</inf>Cl<inf>14</inf>·H<inf>2</inf>O and Vice Versa: Crystal Chemistry Investigations Reviewed

Saito, N., Lemoine, P., Dumait, N., Amela-Cortes, M., Paofai, S., Roisnel, T., Nassif, V., Grasset, F., Wada, Y., Ohashi, N., Cordier, S.

Journal of Cluster Science   28 ( 2 )   773 - 798   2017.3

Conversion of an ultra-wide bandgap amorphous oxide insulator to a semiconductor

Junghwan Kim, Takumi Sekiya, Norihiko Miyokawa, Naoto Watanabe, Koji Kimoto, Keisuke Ide, Yoshitake Toda, Shigenori Ueda, Naoki Ohashi, Hidenori Hiramatsu, Hideo Hosono, Toshio Kamiya

NPG ASIA MATERIALS   9   2017.3

Potential barrier formed at domain boundaries in twinned tetragonal BaTiO <inf>3</inf> single crystals Reviewed

Ohsawa, T., Hirose, S., Ohashi, N.

Applied Physics Letters   110 ( 1 )   2017.1

Resistivity and piezoelectric properties of Ca3TaGa1.5Al1.5Si2O14 single crystals for high temperature sensors Reviewed

Xiuwei Fu, Encarnacion G. Villora, Yoshitaka Matsushita, Yuuki Kitanaka, Yuji Noguchi, Masaru Miyayama, Kiyoshi Shimamura, Naoki Ohashi

RSC ADVANCES   7 ( 89 )   56697 - 56703   2017

Formation mechanism of transparent Mo<inf>6</inf> metal atom cluster film prepared by electrophoretic deposition

Nguyen, T.K.N., Dierre, B., Grasset, F., Renaud, A., Cordier, S., Lemoine, P., Ohashi, N., Uchikoshi, T.

Journal of the Electrochemical Society   164 ( 7 )   2017

Crystalline polarity of ZnO thin films deposited under dc external bias on various substrates

Ohsawa, T., Tsunoda, K., Dierre, B., Zellhofer, C., Grachev, S., Montigaud, H., Ishigaki, T., Ohashi, N.

Journal of Crystal Growth   463   2017

Transparent tantalum cluster-based UV and IR blocking electrochromic devices

A. Renaud, M. Wilmet, T. G. Truong, M. Seze, P. Lemoine, N. Dumait, W. Chen, N. Saito, T. Ohsawa, T. Uchikoshi, N. Ohashi, S. Cordier, F. Grasset

Journal of Materials Chemistry C   5 ( 32 )   2017

Multiple Roles of Hydrogen Treatments in Amorphous In-Ga-Zn-O Films Reviewed

Haochun Tang, Yosuke Kishida, Keisuke Ide, Yoshitake Toda, Hidenori Hiramatsu, Satoru Matsuishi, Shigenori Ueda, Naoki Ohashi, Hideya Kumomi, Hideo Hosono, Toshio Kamiya

ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY   6 ( 7 )   P365 - P372   2017

Solvent-mediated purification of hexa-molybdenum cluster halide, Cs2[Mo6Cl14] for enhanced optical properties

Norio Saito, Pierric Lemoine, Stéphane Cordier, Yoshiki Wada, Takeo Ohsawa, Noriko Saito, Fabien Grasset, Jeffrey Scott Cross, Naoki Ohashi

CrystEngComm   19 ( 40 )   6028 - 6038   2017

New ultra-violet and near-infrared blocking filters for energy saving applications: fabrication of tantalum metal atom cluster-based nanocomposite thin films by electrophoretic deposition

Thi Kim Ngan Nguyen, Adèle Renaud, Maxence Wilmet, Noée Dumait, Serge Paofai, Benjamin Dierre, Wanghui Chen, Naoki Ohashi, Stéphane Cordier, Fabien Grasset, Tetsuo Uchikoshi

J. Mater. Chem. C   5 ( 40 )   10477 - 10484   2017

Simulation of crystal and electronic structures of octahedral molybdenum cluster complex compound Cs₂[Mo₆Cl₁₄] using various DFT functionals

SAITO Norio, LEMOINE Pierric, CORDIER St&eacute;phane, OHSAWA Takeo, WADA Yoshiki, GRASSET Fabien, CROSS Jeffrey Scott, OHASHI Naoki

Journal of the Ceramic Society of Japan   125 ( 10 )   753 - 759   2017

Temperature dependence of electrical resistivity, dielectric and piezoelectric properties of Ca<inf>3</inf>TaGa<inf>3−x</inf>Al<inf>x</inf>Si<inf>2</inf>O<inf>14</inf> single crystals as a function of Al content

Fu, X., Víllora, E.G., Matsushita, Y., Kitanaka, Y., Noguchi, Y., Miyayama, M., Shimamura, K., Ohashi, N.

Journal of Alloys and Compounds   687   797 - 803   2016.12

Pulverization of oxide powders utilizing thermal treatment in ammonia-based atmosphere

Alfian Noviyanto, Toshiyuki Nishimura, Masaaki Kitano, Naoki Ohashi

Journal of the European Ceramic Society   2016.12

Floating zone growth and magnetic properties of Y2C two-dimensional electride Reviewed

Shigeki Otani, Kazuto Hirata, Yutaka Adachi, Naoki Ohashi

JOURNAL OF CRYSTAL GROWTH   454   15 - 18   2016.11

Quantitative secondary ion mass spectrometric analysis of secondary ion polarity in GaN films implanted with oxygen Reviewed

Minako Hashiguchi, Isao Sakaguchi, Yutaka Adachi, Naoki Ohashi

JAPANESE JOURNAL OF APPLIED PHYSICS   55 ( 10 )   101001-1 - 101001-6   2016.10

First-Principles Study of CuGaO<inf>2</inf> Polymorphs: Delafossite α-CuGaO<inf>2</inf> and Wurtzite β-CuGaO<inf>2</inf>

Suzuki, I., Nagatani, H., Kita, M., Iguchi, Y., Sato, C., Yanagi, H., Ohashi, N., Omata, T.

Inorganic Chemistry   55 ( 15 )   7610 - 7616   2016.8

Theoretical and experimental determination of the crystal structures of cesium-molybdenum chloride

Saito, N., Wada, Y., Lemoine, P., Cordier, S., Grasset, F., Ohsawa, T., Saito, N., Cross, J.S., Ohashi, N.

Japanese Journal of Applied Physics   55 ( 7 )   75502 - 75502   2016.6

Isotope tracer investigation and ab-initio simulation of anisotropic hydrogen transport and possible multi-hydrogen centers in tin dioxide Reviewed

Watanabe, K., Sakaguchi, I., Hashiguchi, M., Saito, N., Ross, E.M., Haneda, H., Ohsawa, T., Ohashi, N.

Journal of Applied Physics   119 ( 22 )   25704   2016.6

Influence of Oxygen Partial Pressure during Growth on Optical and Electrical Properties of Ca<inf>3</inf>TaAl<inf>3</inf>Si<inf>2</inf>O<inf>14</inf> Single Crystals Reviewed

Fu, X., Víllora, E.G., Matsushita, Y., Kitanaka, Y., Noguchi, Y., Miyayama, M., Shimamura, K., Ohashi, N.

Crystal Growth and Design   16 ( 4 )   2151 - 2156   2016.4

First principles calculations of ternary wurtzite β-CuGaO<inf>2</inf>

Suzuki, I., Nagatani, H., Kita, M., Iguchi, Y., Sato, C., Yanagi, H., Ohashi, N., Omata, T.

Journal of Applied Physics   119 ( 9 )   2016.3

Inorganic Molybdenum Clusters as Light-Harvester in All Inorganic Solar Cells: A Proof of Concept

Renaud, A., Grasset, F., Dierre, B., Uchikoshi, T., Ohashi, N., Takei, T., Planchat, A., Cario, L., Jobic, S., Odobel, F., Cordier, S.

ChemistrySelect   1 ( 10 )   2016

22aCE-1 Search for ferromagnetic ground state of two-dimensional electride Y_2C using muon spin relaxation

Kojima Kenji M., Hiraishi Masatoshi, Okabe Hirotaka, Koda Akihiro, Kadono Ryosuke, Zhang Xiao, Matsuishi Satoshi, Hosono Hideo, Hirata Kazuto, Otani Shigeki, Ohashi Naoki

Meeting Abstracts of the Physical Society of Japan   71   1776 - 1776   2016

Influence of growth conditions on the optical, electrical resistivity and piezoelectric properties of Ca<inf>3</inf>TaGa<inf>3</inf>Si<inf>2</inf>O<inf>14</inf> single crystals Reviewed

Fu, X., V{\'i}llora, E.G., Matsushita, Y., Kitanaka, Y., Noguchi, Y., Miyayama, M., Shimamura, K., Ohashi, N.

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan   124 ( 5 )   523 - 527   2016

Visible tunable lighting system based on polymer composites embedding ZnO and metallic clusters: from colloids to thin films

Truong, T.G., Dierre, B., Grasset, F., Saito, N., Saito, N., Nguyen, T.K.N., Takahashi, K., Uchikoshi, T., Amela-Cortes, M., Molard, Y., Cordier, S., Ohashi, N.

Science and Technology of Advanced Materials   17 ( 1 )   2016

Fabrication of transparent thin film of octahedral molybdenum metal clusters by electrophoretic deposition

Nguyen, T.K.N., Grasset, F., Dierre, B., Matsunaga, C., Cordier, S., Lemoine, P., Ohashi, N., Uchikoshi, T.

ECS Journal of Solid State Science and Technology   5 ( 10 )   2016

Effects of residual hydrogen in sputtering atmosphere on structures and properties of amorphous In-Ga-Zn-O thin films

Haochun Tang, Kyohei Ishikawa, Keisuke Ide, Hidenori Hiramatsu, Shigenori Ueda, Naoki Ohashi, Hideya Kumomi, Hideo Hosono, Toshio Kamiya

Journal of Applied Physics   118 ( 20 )   205703 - 205703   2015.11

Thermal and piezoelectric properties of La&lt;inf&gt;3&lt;/inf&gt;Ta&lt;inf&gt;0.5&lt;/inf&gt;Ga&lt;inf&gt;5.1&lt;/inf&gt;Al&lt;inf&gt;0.4&lt;/inf&gt;O&lt;inf&gt;14&lt;/inf&gt; (LTGA) for high temperature sensors Reviewed

Fu, X., Víllora, E.G., Oshima, Y., Shimamura, K., Ohashi, N.

Journal of Alloys and Compounds   647   1086 - 1090   2015.10

Investigating crystalline-polarity-dependent electronic structures of GaN by hard x-ray photoemission and ab-initio calculations Reviewed

Ohsawa, T., Ueda, S., Suzuki, M., Tateyama, Y., Williams, J.R., Ohashi, N.

Applied Physics Letters   107 ( 17 )   171604   2015.10

ChemInform Abstract: Bulk, Interface and Surface Properties of Zinc Oxide

Naoki Ohashi

ChemInform   46 ( 18 )   no - no   2015.4

AgBiS<inf>2</inf> single crystal grown using slow cooling method and its characterization Reviewed

Nakamura, M., Nakamura, H., Ohsawa, T., Imura, M., Shimamura, K., Ohashi, N.

Journal of Crystal Growth   411   1 - 3   2015.2

Electric field and temperature dependence of dielectric permittivity in strontium titanate investigated by a photoemission study on Pt/SrTiO&lt;inf&gt;3&lt;/inf&gt;:Nb junctions Reviewed

Hirose, S., Okushi, H., Ueda, S., Yoshikawa, H., Adachi, Y., Ando, A., Ohsawa, T., Haneda, H., Ohashi, N.

Applied Physics Letters   106 ( 19 )   2015

Effects of thermal annealing on elimination of deep defects in amorphous In-Ga-Zn-O thin-film transistors

Tang, H., Ide, K., Hiramatsu, H., Ueda, S., Ohashi, N., Kumomi, H., Hosono, H., Kamiya, T.

Thin Solid Films   614   73 - 78   2015

Transparent ZnO Films Deposited by Aqueous Solution Process Under Various pH Conditions

Hong, J.S., Wagata, H., Ohashi, N., Katsumata, K.-I., Okada, K., Matsushita, N.

Journal of Electronic Materials   44 ( 8 )   2015

Charge compensation by excess oxygen in amorphous In-Ga-Zn-O films deposited by pulsed laser deposition

Orui, T., Herms, J., Hanyu, Y., Ueda, S., Watanabe, K., Sakaguchi, I., Ohashi, N., Hiramatsu, H., Kumomi, H., Hosono, H., Kamiya, T.

IEEE/OSA Journal of Display Technology   11 ( 6 )   2015

Inorganic Molybdenum Octahedral Nanosized Cluster Units, Versatile Functional Building Block for Nanoarchitectonics

Cordier, S., Grasset, F., Molard, Y., Amela-Cortes, M., Boukherroub, R., Ravaine, S., Mortier, M., Ohashi, N., Saito, N., Haneda, H.

Journal of Inorganic and Organometallic Polymers and Materials   25 ( 2 )   2015

Cobalt doping as the controlling factor of oxygen diffusivity in ZnO by more than four orders of magnitude Reviewed

Hashiguchi, M., Sakaguchi, I., Miyazaki, R., Takada, K., Ohashi, N.

Defect and Diffusion Forum   363   85 - 90   2015

Bulk, interface and surface properties of zinc oxide Reviewed

Naoki OHASHI

J. Ceram. Soc. Japan   122 ( 1427 )   530 - 536   2014.7

Zn and Sb interaction and oxygen defect chemistry in dense SnO<inf>2</inf> ceramics co-doped with ZnO and Sb<inf>2</inf>O<inf>5</inf> Reviewed

Hashiguchi, M., Sakaguchi, I., Hishita, S., Ohashi, N.

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan   122 ( 1426 )   421 - 425   2014.6

SnS crystal grown using horizontal gradient freeze method and its electrical properties Reviewed

Masaru Nakamura, Hiroaki Nakamura, Masataka Imura, Shigeki Otani, Kiyoshi Shimamura, Naoki Ohashi

Journal of Alloys and Compounds   591   326 - 328   2014.4

Wurtzite CuGaO<inf>2</inf>: A new direct and narrow band gap oxide semiconductor applicable as a solar cell absorber

Omata, T., Nagatani, H., Suzuki, I., Kita, M., Yanagi, H., Ohashi, N.

Journal of the American Chemical Society   136 ( 9 )   3378 - 3381   2014.3

Impact of electrode oxidation on the current transport properties at platinum/(niobium-doped strontium-titanate) schottky junctions

Hirose, S., Yoshikawa, H., Yanagi, H., Ando, A., Ueda, S., Ohashi, N.

ECS Journal of Solid State Science and Technology   3 ( 7 )   2014

Investigation of charge compensation in indium-doped tin dioxide by hydrogen insertion via annealing under humid conditions Reviewed

Watanabe, K., Ohsawa, T., Sakaguchi, I., Bierwagen, O., White, M.E., Tsai, M.-Y., Takahashi, R., Ross, E.M., Adachi, Y., Speck, J.S., Haneda, H., Ohashi, N.

Applied Physics Letters   104 ( 13 )   2014

Hydrogen in tin dioxide films and bulk ceramics: An attempt to identify the most hidden impurity Reviewed

Watanabe, K., Hashiguchi, M., Sakaguchi, I., Bryant, A., Adachi, Y., Zhen, Y., Ohgaki, T., Ohsawa, T., Haneda, H., Ohashi, N.

Applied Physics Letters   104 ( 4 )   2014

Surface segregation of W doped in ZnO thin films

Suzuki, T.T., Adachi, Y., Saito, N., Hashiguchi, M., Sakaguchi, I., Ohashi, N., Hishita, S.

Surface Science   625   2014

Oxygen diffusion in rare-earth doped BaTiO<inf>3</inf> ceramics Reviewed

Sakaguchi, I., Hirose, S., Furuta, T., Watanabe, K., Kageyama, K., Hishita, S., Haneda, H., Ohashi, N.

Key Engineering Materials   582   189 - +   2014

Effects of dielectric film surface on oxygen diffusion

Suzuki, J., Matsumoto, K., Ryu, M., Iwazaki, Y., Suzuki, T., Watanabe, K., Hashiguchi, M., Sakaguchi, I., Ohashi, N.

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan   122 ( 1426 )   2014

Multi-functional silica nanoparticles based on metal atom clusters: From design to toxicological studies

Aubert, T., Nerambourg, N., Neaime, C., Cabello-Hurtado, F., Esnault, M.-A., Lebret-Chauvel, D., Jeanne, S., Pellen, P., Saito, N., Kimoto, K., Haneda, H., Ohashi, N., Cordier, S., Grasset, F.

Key Engineering Materials   617   2014

Floating zone growth of cerium tetra-boride crystals

Otani, S., Segawa, H., Ohashi, N.

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan   122 ( 1423 )   2014

Ion implantation and diffusion of zinc in dense SnO<inf>2</inf> ceramics

Hashiguchi, M., Sakaguchi, I., Sakamoto, N., Yurimoto, H., Hishita, S., Ohashi, N.

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan   121 ( 1420 )   1004 - 1007   2013.12

Characterization of oxygen defect and zinc segregation in the dense tin dioxide ceramics added with zinc oxide Reviewed

Sakaguchi, I., Sakamoto, N., Hashiguchi, M., Yurimoto, H., Hishita, S., Ohashi, N.

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan   121 ( 1419 )   956 - 959   2013.11

Influence of crystal polarity on Mg incorporation in ZnO

Adachi, Y., Ohashi, N., Sakaguchi, I., Haneda, H.

Physica Status Solidi (B) Basic Research   250 ( 10 )   2122 - 2125   2013.10

Electrical properties of scandium nitride epitaxial films grown on (100) magnesium oxide substrates by molecular beam epitaxy Reviewed

Ohgaki, T., Watanabe, K., Adachi, Y., Sakaguchi, I., Hishita, S., Ohashi, N., Haneda, H.

Journal of Applied Physics   114 ( 9 )   093704-1 - 093704-7   2013.9

Oxygen tracer diffusion in a-axis oriented ZnO thin films grown on (011 2) sapphire by pulsed laser deposition Reviewed

Sakaguchi, I., Watanabe, K., Adachi, Y., Ohgaki, T., Hishita, S., Ohashi, N., Haneda, H.

Key Engineering Materials   566   266 - 270   2013.7

The effect of n- and p-type doping on coherent phonons in GaN Reviewed

Ishioka, K., Kato, K., Ohashi, N., Haneda, H., Kitajima, M., Petek, H.

Journal of Physics Condensed Matter   25 ( 20 )   2013.5

Preparation of Ni2P and Fe2P single crystals by the floating-zone method Reviewed

Otani, S., Ohashi, N.

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan   121 ( 1412 )   331 - 332   2013.4

Erratum: Determination of Schottky barrier profile at Pt/SrTiO 3:Nb junction by x-ray photoemission (Applied Physics Letters (2012) 101 (251911)) Reviewed

Ohashi, N., Yoshikawa, H., Yamashita, Y., Ueda, S., Li, J., Okushi, H., Kobayashi, K., Haneda, H.

Applied Physics Letters   102 ( 7 )   2013.2

Tunable visible emission of luminescent hybrid nanoparticles incorporating two complementary luminophores: ZnO nanocrystals and [Mo <inf>6</inf>Br <inf>14</inf>] ^2- nanosized cluster units

Aubert, T., Nerambourg, N., Saito, N., Haneda, H., Ohashi, N., Mortier, M., Cordier, S., Grasset, F.

Particle and Particle Systems Characterization   30 ( 1 )   2013

Preface

Sakka, Y., Nishimura, T., Ohashi, N., Matsumoto, Y., Matsushita, N.

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan   121 ( 1412 )   2013

Oxygen tracer diffusion in BaTiO<inf>3</inf> ceramics - Effect of Zr impurity from planetary ball milling

Watanabe, K., Sakaguchi, I., Hishita, S., Haneda, H., Ohashi, N.

Key Engineering Materials   566   2013

Surface reactivity and oxygen migration in amorphous indium-gallium-zinc oxide films annealed in humid atmosphere

Watanabe, K., Lee, D.-H., Sakaguchi, I., Nomura, K., Kamiya, T., Haneda, H., Hosono, H., Ohashi, N.

Applied Physics Letters   103 ( 20 )   2013

Polarity control of intrinsic ZnO films using substrate bias

Williams, J.R., Furukawa, H., Adachi, Y., Grachev, S., S?nderg?rd, E., Ohashi, N.

Applied Physics Letters   103 ( 4 )   2013

Extended investigations on luminescent Cs<inf>2</inf>[Mo<inf>6</inf>Br <inf>14</inf>]@SiO<inf>2</inf> nanoparticles: Physico-structural characterizations and toxicity studies

Aubert, T., Cabello-Hurtado, F., Esnault, M.-A., Neaime, C., Lebret-Chauvel, D., Jeanne, S., Pellen, P., Roiland, C., Le Polles, L., Saito, N., Kimoto, K., Haneda, H., Ohashi, N., Grasset, F., Cordier, S.

Journal of Physical Chemistry C   117 ( 39 )   2013

Electron-beam-induced crystallization of amorphous ln-Ga-Zn-0 Thin Films fabricated by UHV sputtering

Toshio Kamiva, Koji Kimoto, Naoki Ohashi, Katsumi Abe, Yuichiro Hanyu, Hideya Kumomi, Hideo Hosono

Proceedings of the International Display Workshops   1   280 - 281   2013

Enhanced ethanol-gas sensing performance of Ce-doped SnO2 hollow nanofibers prepared by electrospinning

Mohanapriya, P., Segawa, H., Watanabe, K., Watanabe, K., Samitsu, S., Natarajan, T.S., Jaya, N.V., Ohashi, N.

Sensors and Actuators, B: Chemical   188   2013

Oxygen diffusion in SrTiO<inf>3</inf> thin films - An attempt to measure oxygen diffusivity at relatively low temperature Reviewed

Ishii, D., Suzuki, T., Kishi, H., Sakaguchi, I., Ohashi, N., Haneda, H.

Key Engineering Materials   566   258 - 261   2013

Determination of Schottky barrier profile at Pt/SrTiO3:Nb junction by x-ray photoemission Reviewed

Ohashi, N., Yoshikawa, H., Yamashita, Y., Ueda, S., Li, J., Okushi, H., Kobayashi, K., Haneda, H.

Applied Physics Letters   101 ( 25 )   2012.12

Influence of substrate nitridation on GaN and InN growth by plasma-assisted molecular-beam epitaxy Reviewed

Yao, Y., Sekiguchi, T., Ohgaki, T., Adachi, Y., Ohashi, N.

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan   120 ( 1407 )   513 - 519   2012.11

An aqueous solution process and subsequent UV treatment for highly transparent conductive ZnO films Reviewed

Wagata, H., Ohashi, N., Katsumata, K.-I., Segawa, H., Wada, Y., Yoshikawa, H., Ueda, S., Okada, K., Matsushita, N.

Journal of Materials Chemistry   22 ( 38 )   20706 - 20712   2012.10

Evaluation of zinc self-diffusion at the interface between homoepitaxial ZnO thin films and (0001) ZnO substrates

Watanabe, K., Matsumoto, K., Adachi, Y., Ohgaki, T., Nakagawa, T., Ohashi, N., Haneda, H., Sakaguchi, I.

Solid State Communications   152 ( 20 )   1917 - 1920   2012.10

Oxygen diffusion phenomena and hydrogen incorporation in reducing BaTiO <inf>3</inf> ceramics doped with ho below solubility limit Reviewed

Sakaguchi, I., Watanabe, K., Hishita, S., Ohashi, N., Haneda, H.

Japanese Journal of Applied Physics   51 ( 10 )   101801-1 - 101801-5   2012.9

Fabricating transparent waveguide for wireless communication Reviewed

Ogino, T., Ohashi, N., Hishita, S., Sakaguchi, I., Adachi, Y., Nakajima, K., Haneda, H.

Thin Solid Films   520 ( 10 )   3835 - 3838   2012.3

Observation and simulation of hard x ray photoelectron diffraction to determine polarity of polycrystalline zinc oxide films with rotation domains Reviewed

Williams, J.R., Píš, I., Kobata, M., Winkelmann, A., Matsushita, T., Adachi, Y., Ohashi, N., Kobayashi, K.

Journal of Applied Physics   111 ( 3 )   2012.2

Polarity-dependent photoemission spectra of wurtzite-type zinc oxide Reviewed

Williams, J., Yoshikawa, H., Ueda, S., Yamashita, Y., Kobayashi, K., Adachi, Y., Haneda, H., Ohgaki, T., Miyazaki, H., Ishigaki, T., Ohashi, N.

Applied Physics Letters   100 ( 5 )   2012.1

Crystal Polarity and Electrical Properties of Heavily Doped ZnO Films

Yutaka Adachi, Naoki Ohashi, Isao Sakaguchi, Hajime Haneda

MRS Proc.   1494   133 - 138   2012.1

Evidence of Eu ²⁺ 4f electrons in the valence band spectra of EuTiO <inf>3</inf> and EuZrO <inf>3</inf>

Kolodiazhnyi, T., Valant, M., Williams, J.R., Bugnet, M., Botton, G.A., Ohashi, N., Sakka, Y.

Journal of Applied Physics   112 ( 8 )   2012

Simultaneous diffusion of oxygen tracer and lithium impurity in aluminum doped zinc oxide Reviewed

Sakaguchi, I., Watanabe, K., Adachi, Y., Ohgaki, T., Hishita, S., Ohashi, N., Haneda, H.

Japanese Journal of Applied Physics   50 ( 12 )   12550-1 - 12550-5   2011.11

Photocatalytic activity and related surface properties of transparent ZNO films prepared by a low-temperature aqueous route Reviewed

Wagata, H., Katsumata, K.-I., Ohashi, N., Sakai, M., Nakajima, A., Fujishima, A., Okada, K., Matsushita, N.

Photochemistry and Photobiology   87 ( 5 )   1009 - 1015   2011.9

Polarity of heavily doped ZnO films grown on sapphire and SiO<inf>2</inf> glass substrates by pulsed laser deposition Reviewed

Adachi, Y., Ohashi, N., Ohgaki, T., Ohnishi, T., Sakaguchi, I., Ueda, S., Yoshikawa, H., Kobayashi, K., Williams, J.R., Ogino, T., Haneda, H.

Thin Solid Films   519 ( 18 )   5875 - 5881   2011.7

Low-loss transmission characteristics of transparent conductive thin films in GHz range Reviewed

Ogino, T., Ohashi, N., Hishita, S., Sakaguchi, I., Adachi, Y., Nakajima, K., Haneda, H.

Key Engineering Materials   485   207 - 210   2011.7

Planarization of Zinc Oxide Surface and Evaluation of Processing Damage Reviewed

Hiroki Miyazaki, Yutaka Adachi, Isao Sakaguchi, Takamasa Ishigaki, Naoki Ohashi

Key Engineering Materials   485   215 - 218   2011.7

Polarity determination of wurtzite-type crystals using hard x-ray photoelectron diffraction Reviewed

Williams, J.R., Kobata, M., Pis, I., Ikenaga, E., Sugiyama, T., Kobayashi, K., Ohashi, N.

Surface Science   605 ( 13-14 )   1336 - 1340   2011.7

The Effect of Citric Ion on the Spin-Sprayed ZnO Films: IR and XPS Study for the Organic Impurities Reviewed

Hajime Wagata, Naoki Ohashi, Ken Ichi Katsumata, Kiyoshi Okada, Nobuhiro Matsushita

Key Engineering Materials   485   291 - 294   2011.7

Focus on Advanced Ceramics Reviewed

Naoki Ohashi

Sci. Technol. Adv. Mater.   12 ( 3 )   030301 - 030301   2011.6

Visualization of grain boundary as blocking layer for oxygen tracer diffusion and a proposed defect model in non doped BaTiO<inf>3</inf> ceramics Reviewed

Watanabe, K., Sakaguchi, I., Hishita, S., Ohashi, N., Haneda, H.

Applied Physics Express   4 ( 5 )   055801-1 - 055801-3   2011.4

Temperature dependence of carrier transport and resistance switching in Pt/SrTi1-xNbxO3 Schottky junctions Reviewed

Li, J., Ohashi, N., Okushi, H., Haneda, H.

Physical Review B - Condensed Matter and Materials Physics   83 ( 12 )   2011.3

Heat capacity and thermodynamic properties of germanium disulfide at temperatures from T = (2 to 1240) K Reviewed

Málek, J., Mitsuhashi, T., Ohashi, N., Taniguchi, Y., Kawaji, H., Atake, T.

Journal of Chemical Thermodynamics   43 ( 3 )   405 - 409   2011.3

Defects in ZnO transparent conductors studied by capacitance transients at ZnO/Si interface Reviewed

Li, B., Adachi, Y., Li, J., Okushi, H., Sakaguchi, I., Ueda, S., Yoshikawa, H., Yamashita, Y., Senju, S., Kobayashi, K., Sumiya, M., Haneda, H., Ohashi, N.

Applied Physics Letters   98 ( 8 )   2011.2

Cation diffusion along basal dislocations in sapphire Reviewed

Nakagawa, T., Nakamura, A., Sakaguchi, I., Shibata, N., Mizoguchi, T., Yamamoto, T., Haneda, H., Ohashi, N., Ikuhara, Y.

Acta Materialia   59 ( 3 )   1105 - 1111   2011.2

Electric property of ZnO based transparent conductor films in GHz range Reviewed

T. Ogino, S. Sato, N. Ohashi, S. Hishita, I. Sakaguchi, Y. Adachi, K. Nakajima, T. Takenaka, H. Haneda

3RD INTERNATIONAL CONGRESS ON CERAMICS (ICC3): ADVANCES IN ELECTRO CERAMICS   18 ( 9 )   092051   2011

XPS study of Sb-/In-doping and surface pinning effects on the Fermi level in SnO2 (101) thin films

Nagata, T., Bierwagen, O., White, M.E., Tsai, M.Y., Yamashita, Y., Yoshikawa, H., Ohashi, N., Kobayashi, K., Chikyow, T., Speck, J.S.

Applied Physics Letters   98 ( 23 )   2011

Cr diffusion in α -Al<inf>2</inf> O<inf>3</inf>: Secondary ion mass spectroscopy and first-principles study Reviewed

Takahashi, N., Mizoguchi, T., Nakagawa, T., Tohei, T., Sakaguchi, I., Kuwabara, A., Shibata, N., Yamamoto, T., Ohashi, N., Ikuhara, Y.

Physical Review B - Condensed Matter and Materials Physics   82 ( 17 )   2010.11

Control of the microstructure and crystalline orientation of ZnO films on a seed-free glass substrate by using a spin-spray method Reviewed

Wagata, H., Ohashi, N., Taniguchi, T., Katsumata, K.-I., Okada, K., Matsushita, N.

Crystal Growth and Design   10 ( 11 )   4968 - 4975   2010.11

Effect of post-annealing on structural and optical properties, and elemental distribution in heavy Eu-implanted ZnO thin films Reviewed

Sakaguchi, I., Ohgaki, T., Adachi, Y., Hishita, S., Ohashi, N., Haneda, H.

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan   118 ( 1383 )   1087 - 1089   2010.11

Investigations of growth kinetics of pulsed laser deposition of tin oxide films by isotope tracer technique Reviewed

Zhen, Y., Ohsawa, T., Adachi, Y., Sakaguchi, I., Li, B., Li, J., Matsuoka, R., Nishimura, T., Matsumoto, K., Haneda, H., Ohashi, N.

Journal of Applied Physics   108 ( 10 )   2010.11

Correlation between film thickness and zinc defect distribution along the growth direction in an isotopic multilayer ZnO thin film grown by pulsed laser deposition analyzed using the internal diffusion method

Matsumoto, K., Adachi, Y., Ohgaki, T., Ohashi, N., Haneda, H., Sakaguchi, I.

Solid State Communications   150 ( 43-44 )   2118 - 2121   2010.11

ZnO-based visible-light photocatalyst: Band-gap engineering and multi-electron reduction by co-catalyst Reviewed

Anandan, S., Ohashi, N., Miyauchi, M.

Applied Catalysis B: Environmental   100 ( 3-4 )   502 - 509   2010.10

Resistance switching properties in Pt/SrTiO<inf>3</inf>:Nb Schottky junctions studied by admittance spectroscopy Reviewed

Li, J., Ohashi, N., Okushi, H., Nakagawa, T., Sakaguchi, I., Haneda, H., Matsuoka, R.

Materials Science and Engineering B: Solid-State Materials for Advanced Technology   173 ( 1-3 )   216 - 219   2010.10

Synthesizing SnO<inf>2</inf> thin films and characterizing sensing performances Reviewed

Ohgaki, T., Matsuoka, R., Watanabe, K., Matsumoto, K., Adachi, Y., Sakaguchi, I., Hishita, S., Ohashi, N., Haneda, H.

Sensors and Actuators, B: Chemical   150 ( 1 )   99 - 104   2010.9

光電子回折法による酸化亜鉛表面の評価

大橋 直樹, 小林 啓介, 小畠 雅明, 安達 裕

応用物理学会学術講演会講演予稿集   2010.2   3750 - 3750   2010.8

Single-step fabrication of ZnO rod arrays on a nonseeded glass substrate by a spin-spray technique at 90 °c Reviewed

Wagata, H., Ohashi, N., Taniguchi, T., Subramani, A.K., Katsumata, K.-I., Okada, K., Matsushita, N.

Crystal Growth and Design   10 ( 8 )   3502 - 3507   2010.8

Synthesis and characterization of Eu³⁺, Ti⁴⁺@ZnO organosols and nanocrystalline c-ZnTiO<inf>3</inf> thin films aiming at high transparency and luminescence Reviewed

Aubert, T., Grasset, F., Potel, M., Nazabal, V., Cardinal, T., Pechev, S., Saito, N., Ohashi, N., Haneda, H.

Science and Technology of Advanced Materials   11 ( 4 )   2010.8

Relationship between aluminum and lithium and annealing for reducing lithium contamination in aluminum-implanted zinc oxide Reviewed

Sakaguchi, I., Matsumoto, K., Ohgaki, T., Hishita, S., Adachi, Y., Nakagawa, T., Watanabe, K., Ohashi, N., Haneda, H.

Key Engineering Materials   445   205 - 208   2010.7

Fabrication and hard X-ray photoemission analysis of photocathodes with sharp solar-blind sensitivity using AlGaN films grown on Si substrates Reviewed

Sumiya, M., Kamo, Y., Ohashi, Naoki., Takeguchi, M., Heo, Y.-U., Yoshikawa, H., Ueda, S., Kobayashi, K., Nihashi, T., Hagino, M., Nakano, T., Fuke, S.

Applied Surface Science   256 ( 14 )   4442 - 4446   2010.5

Oxygen tracer diffusion in magnesium-doped ZnO ceramics

Sakaguchi, I., Matsumoto, K., Ohgaki, T., Adachi, Y., Watanabe, K., Ohashi, N., Haneda, H.

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan   118 ( 1377 )   362 - 365   2010.5

Nitrogen isotopic effect in Ga15N epifilms grown by plasma-assisted molecular-beam epitaxy Reviewed

Yong-zhao Yao, Takeshi Ohgaki, Naoki Fukata, Yutaka Adachi, Yoshiki Wada, Hajime Haneda, Naoki Ohashi

Scripta Materialia   62 ( 7 )   516 - 519   2010.4

Ion implantation and diffusion behavior of silver in zinc oxide Reviewed

Sakaguchi, I., Watanabe, K., Ohgaki, T., Nakagawa, T., Hishita, S., Adachi, Y., Ohashi, N., Haneda, H.

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan   118 ( 1375 )   217 - 219   2010.3

Grain growth systematics for forsterite ± enstatite aggregates: Effect of lithology on grain size in the upper mantle Reviewed

Hiraga, T., Tachibana, C., Ohashi, N., Sano, S.

Earth and Planetary Science Letters   291 ( 1-4 )   10 - 20   2010.3

Development of ZnO-based surface plasmon resonance gas sensor and analysis of UV irradiation effect on NO<inf>2</inf> desorption from ZnO thin films Reviewed

Watanabe, K., Matsumoto, K., Ohgaki, T., Sakaguchi, I., Ohashi, N., Hishita, S., Haneda, H.

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan   118 ( 1375 )   193 - 196   2010.3

Investigation on buffer layer for InN growth by molecular beam epitaxy Reviewed

Yao, Y., Sekiguchi, T., Ohgaki, T., Adachi, Y., Ohashi, N.

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan   118 ( 1374 )   152 - 156   2010.2

Preparation and characterization of Zn¹⁸O/Zn¹⁶O isotope heterostructure thin films

Matsumoto, K., Adachi, Y., Sakaguchi, I., Ohashi, N., Haneda, H.

Journal of the European Ceramic Society   30 ( 2 )   423 - 428   2010.1

Electrical properties of Pt/Nb-doped SrTiO3 Schottky junctions Reviewed

Li, J., Ohgaki, T., Matsuoka, R., Okushi, H., Ohashi, N.

Key Engineering Materials   421-422   463 - +   2010

Synthesis of highly dense and fine-grained aggregates of mantle composites by vacuum sintering of nano-sized mineral powders

Koizumi, S., Hiraga, T., Tachibana, C., Tasaka, M., Miyazaki, T., Kobayashi, T., Takamasa, A., Ohashi, N., Sano, S.

Physics and Chemistry of Minerals   37 ( 8 )   2010

Behavior of hydrogen atoms in perovskite-type oxide thin films under electric fields

Morito, K., Suzuki, T., Mizuno, Y., Sakaguchi, I., Ohashi, N., Matsumoto, K., Haneda, H.

Key Engineering Materials   421-422   281 - 284   2010

Zinc Self-Diffusion in Isotopic Heterostructured Zinc Oxide Thin Films

Kenji Matsumoto, Yutaka Adachi, Takeshi Ohgaki, Isao Sakaguchi, Tsubasa Nakagawa, Naoki Ohashi, Hajime Haneda

Key Engineering Materials   421-422   193 - 196   2009.12

Redistributing Unintentional Defects Induced by Heavy Ion Implantation in ZnO Ceramics Reviewed

Isao Sakaguchi, Tsubasa Nakagawa, Kenji Matsumoto, Syunichi Hishita, Yutaka Adachi, Naoki Ohashi, Hajime Haneda

Key Engineering Materials   421-422   201 - 204   2009.12

Observation of Diffusion Behavior in Al-Implanted ZnO Single Crystal Reviewed

Tsubasa Nakagawa, Isao Sakaguchi, Kenji Matsumoto, Masashi Uematsu, Hajime Haneda, Naoki Ohashi

Key Engineering Materials   421-422   197 - 200   2009.12

Properties of gallium- and aluminum-doped bulk ZnO obtained from single-crystals grown by liquid phase epitaxy

Kobayashi, J., Ohashi, N., Sekiwa, H., Sakaguchi, I., Miyamoto, M., Wada, Y., Adachi, Y., Matsumoto, K., Haneda, H.

Journal of Crystal Growth   311 ( 19 )   4408 - 4413   2009.9

Periodic supply of indium as surfactant for N-polar InN growth by plasma-assisted molecular-beam epitaxy Reviewed

Yao, Y.-Z., Sekiguchi, T., Ohgaki, T., Adachi, Y., Ohashi, N., Okuno, H., Takeguchi, M.

Applied Physics Letters   95 ( 4 )   041913   2009.7

Growth and characterization of isotopic ^natGa¹⁵N by molecular-beam epitaxy Reviewed

Yao, Y.-Z., Ohgaki, T., Matsumoto, K., Sakaguchi, I., Wada, Y., Haneda, H., Sekiguchi, T., Ohashi, N.

Physica Status Solidi (C) Current Topics in Solid State Physics   6 ( SUPPL. 2 )   S707 - S710   2009.5

Oxygen diffusion in zinc-oxide thin films prepared by pulsed-laser deposition

Matsumoto, K., Adachi, Y., Ohgaki, T., Sakaguchi, I., Ohashi, N., Haneda, H.

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan   117 ( 1365 )   666 - 670   2009.5

Synthesis and characterization of ZnO/glass/ZnO structures showing highly nonlinear current-voltage characteristics Reviewed

Ohashi, N., Kataoka, K., Ohgaki, T., Sakaguchi, I., Haneda, H.

Materials Transactions   50 ( 5 )   1060 - 1066   2009.5

Structure and electric properties in tin-doped zinc oxide films synthesized by pulsed laser deposition Reviewed

Venkataraj, S., Hishita, S., Adachi, Y., Sakaguchi, I., Matsumoto, K., Saito, N., Haneda, H., Ohashi, N.

Journal of the Electrochemical Society   156 ( 6 )   H424 - H429   2009.4

Polarity-dependent photoemission spectra of wurtzite-type zinc oxide Reviewed

Ohashi, N., Adachi, Y., Ohsawa, T., Matsumoto, K., Sakaguchi, I., Haneda, H., Ueda, S., Yoshikawa, H., Kobayashi, K.

Applied Physics Letters   94 ( 12 )   2009.3

Growth of bulky single crystalline films of (Zn,Mg)O alloy semiconductors by liquid phase epitaxy

Kobayashi, J., Sekiwa, H., Miyamoto, M., Sakaguchi, I., Wada, Y., Sekiguchi, T., Adachi, Y., Haneda, H., Ohashi, N.

Crystal Growth and Design   9 ( 2 )   1219 - 1224   2009.2

Electronic states in zinc magnesium oxide alloy semiconductors: Hard X-ray photoemission spectroscopy and density functional theory calculations Reviewed

Ohsawa, T., Adachi, Y., Sakaguchi, I., Matsumoto, K., Haneda, H., Ueda, S., Yoshikawa, H., Kobayashi, K., Ohashi, N.

Chemistry of Materials   21 ( 1 )   144 - 150   2009.1

Formation of compensated defects in zinc magnesium oxides assignable from diffusion coefficients and hard x-ray photoemission Reviewed

Ohsawa, T., Sakaguchi, I., Ohashi, N., Haneda, H., Ryoken, H., Matsumoto, K., Hishita, S., Adachi, Y., Ueda, S., Yoshikawa, H., Kobayashi, K.

Applied Physics Letters   94 ( 4 )   2009.1

Growth and characterization of isotopic natGa15N by molecular-beam epitaxy Reviewed

Yong-Zhao Yao, Takeshi Ohgaki, Kenji Matsumoto, Isao Sakaguchi, Yoshiki Wada, Hajime Haneda, Takashi Sekiguchi, Naoki Ohashi

Proceedings of SPIE - The International Society for Optical Engineering   7216   2009

Evaluation of oxide ion diffusivity in YAG ceramics

Haneda, H., Sakaguchi, I., Ohashi, N., Saito, N., Matsumoto, K., Nakagawa, T., Yanagitani, T., Yagi, H.

Materials Science and Technology   25 ( 11 )   2009

Change in polarity of zinc oxide films grown on sapphire substrates without insertion of any buffer layer Reviewed

Adachi, Y., Ohashi, N., Ohnishi, T., Ohgaki, T., Sakaguchi, I., Haneda, H., Lippmaa, M.

Journal of Materials Research   23 ( 12 )   3269 - 3272   2008.12

Analysis of indium diffusion profiles based on the Fermi-level effect in single-crystal zinc oxide Reviewed

Nakagawa, T., Matsumoto, K., Sakaguchi, I., Uematsu, M., Haneda, H., Ohashi, N.

Japanese Journal of Applied Physics   47 ( 10 PART 1 )   7848 - 7850   2008.10

Influence of Hydrogen Atoms on Electrical Properties of BST Thin Film Capacitors

Kentaro Morito, Toshimasa Suzuki, Youichi Mizuno, Isao Sakaguchi, Naoki Ohashi, Hajime Haneda

Key Engineering Materials   388   167 - 170   2008.9

Positive Hall coefficients obtained from contact misplacement on evident n-type ZnO films and crystals

Ohgaki, T., Ohashi, N., Sugimura, S., Ryoken, H., Sakaguchi, I., Adachi, Y., Haneda, H.

Journal of Materials Research   23 ( 9 )   2293 - 2295   2008.9

Growth of thick zinc magnesium oxide by liquid phase epitaxy

Kobayashi, J., Sekiwa, H., Miyamoto, M., Ohashi, N., Sakaguchi, I., Wada, Y., Adachi, Y., Haneda, H.

Applied Physics Express   1 ( 7 )   0712011 - 0712013   2008.7

Formation of Ni<inf>3</inf>C nanocrystals by thermolysis of nickel acetylacetonate in oleylamine: Characterization using hard X-ray photoelectron spectroscopy Reviewed

Goto, Y., Taniguchi, K., Omata, T., Otsuka-Yao-Matsuo, S., Ohashi, N., Ueda, S., Yoshikawa, H., Yamashita, Y., Oohashi, H., Kobayashi, K.

Chemistry of Materials   20 ( 12 )   4156 - 4160   2008.6

Hard x-ray photoemission spectroscopy in wurtzite-type zinc magnesium oxide solid-solution films grown by pulsed-laser deposition

Ohsawa, T., Ohashi, N., Adachi, Y., Sakaguchi, I., Ryoken, H., Matsumoto, K., Haneda, H., Ueda, S., Yoshikawa, H., Kobayashi, K.

Applied Physics Letters   92 ( 23 )   2008.6

Photoluminescence and x-ray diffraction measurements of InN epifilms grown with varying InN ratio by plasma-assisted molecular-beam epitaxy Reviewed

Yao, Y.-Z., Sekiguchi, T., Ohashi, N., Adachi, Y., Ohgaki, T.

Applied Physics Letters   92 ( 21 )   211910   2008.5

InN growth by plasma-assisted molecular beam epitaxy with indium monolayer insertion Reviewed

Yao, Y., Sekiguchi, T., Sakuma, Y., Ohashi, N., Adachi, Y., Okuno, H., Takeguchi, M.

Crystal Growth and Design   8 ( 3 )   1073 - 1077   2008.3

Effects of specimen preparation on the cathodoluminescence properties of ZnO nanoparticles

Dierre, B., Yuan, X.L., Ohashi, N., Sekiguchi, T.

Journal of Applied Physics   103 ( 8 )   2008

Diffusion properties of point defects in barium strontium titanate thin films Reviewed

Morito, K., Suzuki, T., Kishi, H., Sakaguchi, I., Ohashi, N., Haneda, H.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control   54 ( 12 )   2567 - 2572   2007.12

Role of crystalline polarity in interfacial properties of zinc oxide varistors Reviewed

Ohashi, N., Kataoka, K., Ohgaki, T., Sakaguchi, I., Haneda, H., Kitamura, K., Fujimoto, M.

Japanese Journal of Applied Physics, Part 2: Letters   46 ( 41-44 )   L1042 - L1044   2007.11

Lowered stimulated emission threshold of zinc oxide by hydrogen doping with pulsed argon-hydrogen plasma Reviewed

Ohashi, N., Wang, Y.-G., Ishigaki, T., Wada, Y., Taguchi, H., Sakaguchi, I., Ohgaki, T., Adachi, Y., Haneda, H.

Journal of Crystal Growth   306 ( 2 )   316 - 320   2007.8

Structural and magnetic properties of Mn-ion implanted ZnO films

Venkataraj, S., Ohashi, N., Sakaguchi, I., Adachi, Y., Ohgaki, T., Ryoken, H., Haneda, H.

Journal of Applied Physics   102 ( 1 )   2007.7

Crystallinity and polarity of indium nitride films grown on the c-face of zinc oxide Reviewed

Ohgaki, T., Ohashi, N., Ohnishi, T., Haneda, H., Lippmaa, M., Yasumori, A.

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan   115 ( 1343 )   414 - 418   2007.7

Diffusion model of gallium in single-crystal zno proposed from analysis of concentration-dependent profiles based on the fermi-level effect Reviewed

Nakagawa, T., Sakaguchi, I., Uematsu, M., Sato, Y., Ohashi, N., Haneda, H., Ikuhara, Y.

Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers   46 ( 7 A )   4099 - 4101   2007.7

Detecting real oxygen ions in polycrystalline diamond thin film using secondary ion mass spectrometry Reviewed

Nakagawa, T., Sakaguchi, I., Haneda, H., Ohashi, N., Ikuhara, Y.

Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers   46 ( 6 A )   3391 - 3393   2007.6

The influence of indium monolayer insertion on the InN epifilm grown by plasma-assisted molecular beam epitaxy Reviewed

Yongzhao Yao, Takashi Sekiguchi, Yoshiki Sakuma, Naoki Ohashi

Journal of Crystal Growth   301-302   521 - 524   2007.4

二次イオン質量分析を用いた酸化亜鉛薄膜のキャラクタリゼーション

羽田 肇, 坂口 勲, 齋藤 紀子, 大橋 直樹, 菱田 俊一

真空 「JOURNAL OF THE VACUUM SOCIETY OF JAPAN」   50 ( 2 )   123 - 127   2007.2

Growth of KNbO3 films by solid-state diffusion technique

Adachi, Y., Hishita, S., Ohashi, N., Haneda, H.

Ferroelectrics   357 ( 1 PART 3 )   185 - 190   2007

The Effect of Pt-Electrode Structures on the Ferroelectric Properties of Bismuth Titanate Thin Films Reviewed

Shunichi Hishita, Isao Sakaguchi, Naoki Ohashi, Hajime Haneda

FERROELECTRICS   347   150 - 156   2007

Photocatalytic nanoparticle deposition on LiNbO3 nanodomain patterns via photovoltaic effect

Liu, X., Kitamura, K., Terabe, K., Hatano, H., Ohashi, N.

Applied Physics Letters   91 ( 4 )   2007

Fabrication of ZnO microstructures by anisotropic wet-chemical etching Reviewed

Ohashi, N., Takahashi, K., Hishita, S., Sakaguchi, I., Funakubo, H., Haneda, H.

Journal of the Electrochemical Society   154 ( 2 )   D82 - D87   2007

Virtual structure in luminescence profile of zinc oxide films causing discrepancy in peak identification Reviewed

Wang, Y.-G., Ohashi, N., Ryoken, H., Haneda, H.

Journal of Applied Physics   100 ( 11 )   2006.12

Study of optical properties of zinc oxide thin film implanted with nitrogen by combinatorial ion implantation techniques

Sakaguchi, I., Sato, Y., Haneda, H., Ohashi, N.

Japanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers   45 ( 9 A )   7053 - 7055   2006.9

Near-Infrared Light Emission from of Er-Doped ZnO Thin Film in Micropits Processed on Si Substrate

Shigeru Tanaka, Yukari Ishikawa, Naoki Ohashi, Junichi Niitsuma, Takashi Sekiguchi, Noriyoshi Shibata

Key Engineering Materials   320   113 - 116   2006.9

Lowering of stimulated emission threshold of zinc oxide by doping with thermally diffused aluminum supplied from sapphire substrate Reviewed

Wang, Y.-G., Ohashi, N., Wada, Y., Sakaguchi, I., Ohgaki, T., Haneda, H.

Journal of Applied Physics   100 ( 2 )   2006.7

SIMS analysis of impurities and nitrogen isotopes in gallium nitride thin films Reviewed

Haneda, H., Ohgaki, T., Sakaguchi, I., Ryoken, H., Ohashi, N., Yasumori, A.

Applied Surface Science   252 ( 19 )   7265 - 7268   2006.7

Molecular beam epitaxy growth of indium nitride films on c-face zinc oxide substrates Reviewed

Ohgaki, T., Ohashi, N., Haneda, H., Yasumori, A.

Journal of Crystal Growth   292 ( 1 )   33 - 39   2006.6

Effect of Al-Doping into Zinc Oxide Films Prepared by Pulsed Laser Deposition Method with Various Oxidation Assists

Haruki Ryoken, Isao Sakaguchi, Takeshi Ohgaki, Yoshitaka Adachi, Tadashi Takenaka, Naoki Ohashi, Hajime Haneda

Key Engineering Materials   301   75 - 78   2006.1

Synthesis of (Ba,Ca)(Zr,Ti)O₃ Ceramics from Ultra-Fine Precursors

Jin Amagai, Yuzo Kato, Akira Ueki, Noriko Saito, Naoki Ohashi, Hajime Haneda

Key Engineering Materials   301   235 - 238   2006.1

Interfacial Structure of GaN and InN Thin Films Grown on ZnO Substrates

Takeshi Ohgaki, Shigeaki Sugimura, Haruki Ryoken, Naoki Ohashi, Isao Sakaguchi, Takashi Sekiguchi, Hajime Haneda

Key Engineering Materials   301   79 - 82   2006.1

Diffusion phenomena and lattice defects of oxide ceramics

Haneda, H., Sakaguchi, I., Ohashi, N., Ryoken, H., Itoh, J.

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy   53 ( 1 )   2006

ZnO light-emission array fabricated into nanometer-scale pits on silicon substrate

Naoki Ohashi, Isao Sakaguchi, Takashi Sekiguchi, Hajime Haneda, Kazuyoshi Kobayashi, Hidetoshi Masauda, Hirokazu Chazono, Masayuki Fujimoto

Materials Research Society Symposium Proceedings   891   419 - 424   2006

Structures and properties of (Zn,Mg)O films studied from the aspect of phase equilibria

Ryoken, H., Ohashi, N., Sakaguchi, I., Adachi, Y., Hishita, S., Haneda, H.

Journal of Crystal Growth   287 ( 1 )   2006

The Effect of Pt-Electrode Structures on the Ferroelectric Properties of Bismuth Titanate Thin Films

Hishita Shunichi, Sakaguchi Isao, Ohashi Naoki, Haneda Hajime

Abstract book of Russia/CIS/Baltic/Japan Symposium on Ferroelectricity   2006   122 - 122   2006

Influence of Ar-H2-SF6 thermal plasma treatment of MCMB powders on the anode properties of a lithium ion rechargeable battery

Tanaka, H., Kurihara, M., Xu, J.-Y., Ohashi, N., Maruyama, S., Moriyoshi, Y., Ishigaki, T.

Thin Solid Films   506-507   2006

Improved UV emission of zinc oxide through hyrogen doping in pulse-modulated high-power ICP

Ishigaki, T., Ohashi, N., Taguchi, H., Ye, R., Haneda, H., Ito, S.

Thin Solid Films   506-507   2006

Enhancement and patterning of ultraviolet emission in ZnO with an electron beam

Xie, R., Sekiguchi, T., Ishigaki, T., Ohashi, N., Li, D., Yang, D., Liu, B., Bando, Y.

Applied Physics Letters   88 ( 13 )   2006

Synthesis of high density and transparent forsterite ceramics using nano-sized precursors and their dielectric properties

Sano, S., Saito, N., Matsuda, S.-I., Ohashi, N., Haneda, H., Arita, Y., Takemoto, M.

Journal of the American Ceramic Society   89 ( 2 )   2006

Ceramics

Kamiya, T., Ohashi, N., Tanaka, J.

Springer Series in Materials Science   84   2006

Defect structure in (Zn,Mg)O films prepared on YSZ substrate Reviewed

Ryoken, H., Sakaguchi, I., Ohashi, N., Adachi, Y., Ohgaki, T., Hishita, S., Haneda, H.

Key Engineering Materials   320   103 - 106   2006

Origin of visible-light-driven photocatalysis: A comparative study on N/F-doped and N-F-codoped TiO2 powders by means of experimental characterizations and theoretical calculations Reviewed

Li, D., Ohashi, N., Hishita, S., Kolodiazhnyi, T., Haneda, H.

Journal of Solid State Chemistry   178 ( 11 )   3293 - 3302   2005.11

Non-equilibrium defects in aluminum-doped zinc oxide thin films grown with a pulsed laser deposition method Reviewed

Ryoken, H., Sakaguchi, I., Ohashi, N., Sekiguchi, T., Hishita, S., Haneda, H.

Journal of Materials Research   20 ( 10 )   2866 - 2872   2005.10

Study of optical property in ZnO thin film implanted with Eu by combinatorial ion implantation techniques Reviewed

Sakaguchi, I., Sato, Y., Ryoken, H., Hishita, S., Ohashi, N., Haneda, H.

Japanese Journal of Applied Physics, Part 2: Letters   44 ( 37-41 )   L1289 - L1292   2005.9

Morphological reform of ZnO particles induced by coupling with MO x (M=V,W,Ce) and the effects on photocatalytic activity Reviewed

Li, D., Haneda, H., Ohashi, N., Saito, N., Hishita, S.

Thin Solid Films   486 ( 1-2 )   20 - 23   2005.8

Optimization of annealing time and Cu concentration for study of luminescence properties of Cu-implanted ZnO thin films Reviewed

Sakaguchi, I., Ryoken, H., Sato, Y., Hishita, S., Ohashi, N., Saito, N., Haneda, H.

Japanese Journal of Applied Physics, Part 2: Letters   44 ( 24-27 )   L770 - L773   2005.6

Visible-light-driven N-F-codoped TiO2 photocatalysts. 2. Optical characterization, photocatalysis, and potential application to air purification Reviewed

Li, D., Haneda, H., Hishita, S., Ohashi, N.

Chemistry of Materials   17 ( 10 )   2596 - 2602   2005.5

Visible-light-driven N-F-codoped TiO<inf>2</inf> photocatalysts. 1. Synthesis by spray pyrolysis and surface characterization Reviewed

Li, D., Haneda, H., Hishita, S., Ohashi, N.

Chemistry of Materials   17 ( 10 )   2588 - 2595   2005.5

Visible-light-active nitrogen-containing TiO2 photocatalysts prepared by spray pyrolysis Reviewed

Li, D., Haneda, H., Hishita, S., Ohashi, N.

Research on Chemical Intermediates   31 ( 4-6 SPEC. ISS. )   331 - 341   2005.5

Effect of ion irradiation on the evolution of Pt film morphology Reviewed

Hishita, S., Sakaguchi, I., Ohashi, N., Saito, N., Haneda, H.

Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms   232 ( 1-4 )   348 - 352   2005.5

Effects of precursor's grain size on syntheses and characteristics of CaZrO 3 powders and (Ca,Ba)(Zr, Ti)O 3 ceramics

Amagai, J., Kato, Y., Ueki, A., Saito, N., Ohashi, N., Haneda, H.

Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy   52 ( 4 )   255 - 260   2005.4

Visible-light-driven nitrogen-doped TiO2 photocatalysts: Effect of nitrogen precursors on their photocatalysis for decomposition of gas-phase organic pollutants Reviewed

Li, D., Haneda, H., Hishita, S., Ohashi, N.

Materials Science and Engineering B: Solid-State Materials for Advanced Technology   117 ( 1 )   67 - 75   2005.2

Structure and properties of GaN films grown on single crystalline ZnO substrates by molecular beam epitaxy Reviewed

Ohgaki, T., Sugimura, S., Ohashi, N., Sakaguchi, I., Sekiguchi, T., Haneda, H.

Journal of Crystal Growth   275 ( 1-2 )   E1143 - E1148   2005.2

Visible-light-driven photocatalysis on fluorine-doped TiO 2 powders by the creation of surface oxygen vacancies Reviewed

Li, D., Haneda, H., Labhsetwar, N.K., Hishita, S., Ohashi, N.

Chemical Physics Letters   401 ( 4-6 )   579 - 584   2005.1

Fluorine-doped TiO 2 powders prepared by spray pyrolysis and their improved photocatalytic activity for decomposition of gas-phase acetaldehyde Reviewed

Li, D., Haneda, H., Hishita, S., Ohashi, N., Labhsetwar, N.K.

Journal of Fluorine Chemistry   126 ( 1 )   69 - 77   2005.1

Formation of diamond and graphite at high pressure using glassy carbon source

Fukunaga, O., Miyake, T., Ohashi, N.

Diamond and Related Materials   14 ( 2 )   2005